We live in a 4 bedroomed detached house. Our Potterton Netaheat 10-16 has served us well for over 30 years but has now developed a slight leak in the main gas valve which is now out of production and obsolete. Despite trawling the internet I cannot get a replacement valve, so it has to be a replacement boiler. I have had estimates in from "Gas Safe" plumbers who all seem to tell me a different story, e.g. I need a system boiler, another says a replacementregular boiler will suffice, some say I will need a new pump as well, others say it is not necessary to have a new pump, another plumber says he will have to get floorboards up in bathroom (where hot water tank is located) to run a cable through so the new boiler will not burn out the heater (I have probably not understood that?).
I have looked at "Which" recomendations and my humble opinion is that Worcester Bosch Greenstar 18Ri regular (condensing?) boiler is suitable for us.
Any comments/suggestions/help/advice would be appreciated.